- public class BitmapUtils {
- /**
- * 图像背景圆角处理
- * bitmap要处理的图片 roundPx 图片弯角的圆度一般是5到10之间
- */
- public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
- // 创建与原图大小一样的bitmap文件,Config.ARGB_8888根据情况可以改用其它的
- Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
- // 实例画布,绘制的bitmap将保存至output中
- Canvas canvas = new Canvas(output);
- final int color = 0xff424242;//写自己需要的颜色值
- final Paint paint = new Paint();
- final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
- final RectF rectF = new RectF(rect);
- paint.setAntiAlias(true);
- canvas.drawARGB(0, 0, 0, 0);
- paint.setColor(color);
- canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
- paint.setXfermode(new PorterDuffXfermode(android.graphics.PorterDuff.Mode.SRC_IN));
- canvas.drawBitmap(bitmap, rect, rect, paint);
- bitmap.recycle();
- bitmap = null;
- return output;
- }
- /**
- * bitmap缩放
- * width要缩放的宽度 height要缩放的高度
- */
- public static Bitmap getBitmapDeflation(Bitmap bitmap, int width, int height, boolean recycle) {
- if (null == bitmap) {
- return null;
- }
- float scaleWidth = 0f;
- float scaleHeight = 0f;
- // 获取bitmap宽高
- int bitmapWidth = bitmap.getWidth();
- int bitmapHeight = bitmap.getHeight();
- // 计算缩放比,图片的宽高小于指定的宽高则不缩放
- if (width < bitmapWidth) {
- scaleWidth = ((float) width) / bitmapWidth;
- } else {
- scaleWidth = 1.00f;
- }
- if (height < bitmapHeight) {
- scaleHeight = ((float) height) / bitmapHeight;
- } else {
- scaleHeight = 1.00f;
- }
- Matrix matrix = new Matrix();
- matrix.postScale(scaleWidth, scaleHeight);
- Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmapWidth, bitmapHeight, matrix, true);
- if (recycle && !bitmap.isRecycled()) {
- bitmap.recycle();
- }
- bitmap = null;
- return newBitmap;
- }
- /**
- *
- * 方法概述:进入图片的大小与质量压缩,用于区分大小图片
- */
- public static Bitmap getCompressedImage(String srcPath) {
- BitmapFactory.Options newOpts = new BitmapFactory.Options();
- // 开始读入图片,此时把options.inJustDecodeBounds 设回true了
- newOpts.inPreferredConfig = Bitmap.Config.RGB_565;
- newOpts.inPurgeable = true;
- newOpts.inJustDecodeBounds = true;
- FileInputStream is = null;
- try {
- is = new FileInputStream(srcPath);
- } catch (FileNotFoundException e) {
- e.printStackTrace();
- }
- Bitmap bitmap = BitmapFactory.decodeStream(is, null, newOpts);// 此时返回bm为空
- newOpts.inJustDecodeBounds = false;
- int w = newOpts.outWidth;
- int h = newOpts.outHeight;
- // 现在主流手机比较多是800*480分辨率,所以高和宽我们设置为
- float hh = 130f;// 这里设置高度为800f
- float ww = 130f;// 这里设置宽度为480f
- // 缩放比。由于是固定比例缩放,只用高或者宽其中一个数据进行计算即可
- int be = 1;// be=1表示不缩放
- if (w > h && w > ww) {// 如果宽度大的话根据宽度固定大小缩放
- be = (int) (newOpts.outWidth / ww);
- } else if (w < h && h > hh) {// 如果高度高的话根据宽度固定大小缩放
- be = (int) (newOpts.outHeight / hh);
- }
- if (be <= 0) {
- be = 1;
- }
- newOpts.inSampleSize = be;// 设置缩放比例
- // 重新读入图片,注意此时已经把options.inJustDecodeBounds 设回false了
- bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
- if (bitmap != null) { return compressImageSize(bitmap, 8);// 压缩好比例大小后再进行质量压缩
- }
- return null;
- }
- /**
- *
- * 方法概述:图片质量压缩
- */
- protected static Bitmap compressImageSize(Bitmap image, int size) {
- if (image == null)
- return image;
- ByteArrayOutputStream baos = new ByteArrayOutputStream();
- image.compress(Bitmap.CompressFormat.JPEG, 100, baos);// 质量压缩方法,这里10表示不压缩,把压缩后的数据存放到baos中
- int options = 100;
- while (baos.toByteArray().length / 1000 > size && options / 3 > 0) { // 循环判断如果压缩后图片是否大于10kb,大于继续压缩
- baos.reset();// 重置baos即清空baos
- image.compress(Bitmap.CompressFormat.JPEG, options, baos);// 这里压缩options%,把压缩后的数据存放到baos中
- options -= options / 3;// 每次都减少30%
- }
- ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());// 把压缩后的数据baos存放到ByteArrayInputStream中
- Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);// 把ByteArrayInputStream数据生成图片
- return bitmap;
- }
- /**
- *
- * 方法概述:保存图片
- */
- public static String saveBitmapWithName(String path, String bitName, Bitmap mBitmap) {
- File f = new File(path + bitName + ".png");
- String url = path + bitName + ".png";
- try {
- f.createNewFile();
- } catch (IOException e) {
- System.out.println("文件创建出错");
- }
- FileOutputStream fOut = null;
- try {
- fOut = new FileOutputStream(f);
- } catch (FileNotFoundException e) {
- System.out.println(" 创建文件流失败");
- e.printStackTrace();
- }
- mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
- try {
- fOut.flush();
- } catch (IOException e) {
- e.printStackTrace();
- }
- try {
- fOut.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- return url;
- }
- /**
- *
- * 方法概述:根据传入参数保存图片
- */
- public static boolean saveImageTo(Bitmap photo, String spath) {
- try {
- BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(spath, false));
- photo.compress(Bitmap.CompressFormat.PNG, 100, bos);
- bos.flush();
- bos.close();
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- return true;
- }
- }
来源: http://www.phpxs.com/code/1002202/